light year - Otterbein University
... Human scale: yardstick Geographical scale: triangulation Solar system scale: Radar ranging Intragalactic scale: – Close stars: stellar parallax – Far: spectroscopic parallax ...
... Human scale: yardstick Geographical scale: triangulation Solar system scale: Radar ranging Intragalactic scale: – Close stars: stellar parallax – Far: spectroscopic parallax ...
Chapter 19. Mapping the Universe from Herschel to Sloan
... 0 to indicate that it is the value of the constant “today”. If we go back in time a great distance (corresponding to looking out in space a great distance), then the Hubble constant may have been different. This means that the relationship between v and d is not exactly a straight line when extended ...
... 0 to indicate that it is the value of the constant “today”. If we go back in time a great distance (corresponding to looking out in space a great distance), then the Hubble constant may have been different. This means that the relationship between v and d is not exactly a straight line when extended ...
Galaxies – Island universes
... • Galaxies form from collisions of proto-galactic clumps in the first billion years or so after the Big Bang • Many have later infalling matter which has been pulled on by nearby mass and thus doesn’t fall straight in. It settles into a rotating disk, arranging itself into a flat, roughly circularly ...
... • Galaxies form from collisions of proto-galactic clumps in the first billion years or so after the Big Bang • Many have later infalling matter which has been pulled on by nearby mass and thus doesn’t fall straight in. It settles into a rotating disk, arranging itself into a flat, roughly circularly ...
7.1 What The Heavens Are Declaring About God`s
... Evidence for the Big Bang 2: Background Radiation If the Big Bang occurred, it would have radiated heat out in all directions. This heat radiation would have cooled as it spread out. Today it should be found everywhere in a faint, low-energy form on the outer edges of our universe. This radiation w ...
... Evidence for the Big Bang 2: Background Radiation If the Big Bang occurred, it would have radiated heat out in all directions. This heat radiation would have cooled as it spread out. Today it should be found everywhere in a faint, low-energy form on the outer edges of our universe. This radiation w ...
Galaxies
... This lesson deals with important topics relating to galaxies. Each of these topics represents a great body of knowledge and areas of interest to research. Historically, galaxies were called nebulae meaning clouds and only later was it realised that they were vast collections of stars, gas and dust l ...
... This lesson deals with important topics relating to galaxies. Each of these topics represents a great body of knowledge and areas of interest to research. Historically, galaxies were called nebulae meaning clouds and only later was it realised that they were vast collections of stars, gas and dust l ...
absolute brightness: The apparent brightness a star would have if it
... dark energy: A mysterious source of energy introduced to explain the acceleration of the expansion of the Universe. One possible explanation is that it is the energy present in empty space - "vacuum energy" - which has the properties of a repulsive force. dark halo: A large envelope of dark matter a ...
... dark energy: A mysterious source of energy introduced to explain the acceleration of the expansion of the Universe. One possible explanation is that it is the energy present in empty space - "vacuum energy" - which has the properties of a repulsive force. dark halo: A large envelope of dark matter a ...
TF_final3 - Arecibo Observatory
... i in infrared. The TullyFisher relation states that the bigger the galaxy is, the faster it rotates. The faster the galaxy rotates, the wider is the emission line in velocity. Also, the bigger the galaxy, the more is its luminosity. TullyFisher relation shows that for normal galaxies, the velocity w ...
... i in infrared. The TullyFisher relation states that the bigger the galaxy is, the faster it rotates. The faster the galaxy rotates, the wider is the emission line in velocity. Also, the bigger the galaxy, the more is its luminosity. TullyFisher relation shows that for normal galaxies, the velocity w ...
The Hubble Redshift Distance Relation
... Refer to the Appendix for an explanation of magnitudes.) The typical galaxy is assumed to have an absolute magnitude of -22. Absolute magnitude is analogous to luminosity, and is an intrinsic property of galaxies. How bright the galaxy appears to us is measured by its apparent magnitude, which is an ...
... Refer to the Appendix for an explanation of magnitudes.) The typical galaxy is assumed to have an absolute magnitude of -22. Absolute magnitude is analogous to luminosity, and is an intrinsic property of galaxies. How bright the galaxy appears to us is measured by its apparent magnitude, which is an ...
Getting to Know: Structure of the Universe
... Misconception 1: I saw a picture of the Milky Way galaxy on the Internet. Is the picture a real image of the Milky Way galaxy? The Milky Way galaxy is very big, and no cameras have yet been able to travel outside of the Milky Way to take its picture. Several galaxies look similar to the Milky Way, ...
... Misconception 1: I saw a picture of the Milky Way galaxy on the Internet. Is the picture a real image of the Milky Way galaxy? The Milky Way galaxy is very big, and no cameras have yet been able to travel outside of the Milky Way to take its picture. Several galaxies look similar to the Milky Way, ...
Lecture 18 Gamma-Ray Bursts
... Total rotational kinetic energy for a neutron star E rot ~ 2 ! 1052 (1 ms/P)2 (R/10 km)2 erg This is the maximum value for a cold, rigidly rotating neutron star. A proto-neutron star at 10 - 100 ms is neither. Its large entropy makes the radius bigger and Erot less, differential rotation increases E ...
... Total rotational kinetic energy for a neutron star E rot ~ 2 ! 1052 (1 ms/P)2 (R/10 km)2 erg This is the maximum value for a cold, rigidly rotating neutron star. A proto-neutron star at 10 - 100 ms is neither. Its large entropy makes the radius bigger and Erot less, differential rotation increases E ...
Test #4
... 1. The location of the center of the Galaxy is determined by observations of: a) Cepheids variables, b) Globular clusters, c) The spiral arms, d) A visually bright, massive, object around which all objects in the Galaxy move. 2. What two observations of an object allow for a determination of the Mil ...
... 1. The location of the center of the Galaxy is determined by observations of: a) Cepheids variables, b) Globular clusters, c) The spiral arms, d) A visually bright, massive, object around which all objects in the Galaxy move. 2. What two observations of an object allow for a determination of the Mil ...
Paper - Astrophysics - University of Oxford
... Fig 3. Simulated Hubble diagram, normalised to a cosmological model for an empty Universe, for supernovae out to redshift 10. The points at z<2 are taken from recent Type Ia Supernova studies5,6. The points at z>1 represent simulated observations with a 100m ground-based ELT. Black circles represent ...
... Fig 3. Simulated Hubble diagram, normalised to a cosmological model for an empty Universe, for supernovae out to redshift 10. The points at z<2 are taken from recent Type Ia Supernova studies5,6. The points at z>1 represent simulated observations with a 100m ground-based ELT. Black circles represent ...
Assignment 10
... ____ 10. Edwin Hubble was able to show that (with the exception of our nearest neighbors) the farther a galaxy is from us, the a. brighter it looks b. bluer its color c. the later in its life we are seeing it d. the larger its halo is e. the faster it is moving away from us ____ 11. The Andromeda ...
... ____ 10. Edwin Hubble was able to show that (with the exception of our nearest neighbors) the farther a galaxy is from us, the a. brighter it looks b. bluer its color c. the later in its life we are seeing it d. the larger its halo is e. the faster it is moving away from us ____ 11. The Andromeda ...
Sirius Astronomer - Orange County Astronomers
... quakes. The new images show boulders that toppled from a Martian cliff, some of them leaving trails in the soil. These were compared to dislodged rocks and their trails on Earth, and found to match images of rocks dislodged by earthquakes. The size and number of boulders decreased with distance from ...
... quakes. The new images show boulders that toppled from a Martian cliff, some of them leaving trails in the soil. These were compared to dislodged rocks and their trails on Earth, and found to match images of rocks dislodged by earthquakes. The size and number of boulders decreased with distance from ...
File
... spirals, but with the presence of a bar in the central regions. E = elliptical galaxies -- galaxies with smooth light distributions, biaxial profiles. Round to oval in shape. Irr = irregular galaxies -- galaxies that did not have the regular structure of the above groups Cause of Galaxy Types ...
... spirals, but with the presence of a bar in the central regions. E = elliptical galaxies -- galaxies with smooth light distributions, biaxial profiles. Round to oval in shape. Irr = irregular galaxies -- galaxies that did not have the regular structure of the above groups Cause of Galaxy Types ...
globular cluster - Harding University
... using direct parallax measurements. Distances to the Cepheid variables in our own galaxy were determined using statistical techniques, and were dependent upon these theoretical calculations. This situation recently changed with the Hipparcos satellite, and we were able to get a more accurate measure ...
... using direct parallax measurements. Distances to the Cepheid variables in our own galaxy were determined using statistical techniques, and were dependent upon these theoretical calculations. This situation recently changed with the Hipparcos satellite, and we were able to get a more accurate measure ...
Lecture 12: Galaxies View of the Galaxy from within Comparison to
... Galactic centre at a speed of about 220 km s-1. • It takes about 220 million years to complete one orbit ...
... Galactic centre at a speed of about 220 km s-1. • It takes about 220 million years to complete one orbit ...
Lecture 31
... sources) and found its distance from its redshift to be 2 billion light years--not a star, and L = 1040 watts--1,000 L (MW)!! .8 to 14(?) Billion years--distance range. L = 1038-1042 watts. Energy comes from a region solar system-sized. Radio Jets. A thermal (synchotron) and non-thermal (black-body) ...
... sources) and found its distance from its redshift to be 2 billion light years--not a star, and L = 1040 watts--1,000 L (MW)!! .8 to 14(?) Billion years--distance range. L = 1038-1042 watts. Energy comes from a region solar system-sized. Radio Jets. A thermal (synchotron) and non-thermal (black-body) ...
Size and Scale of the Universe
... • The region of the Galaxy within about 20 lightyears of the Sun (40 lightyears diameter) • A light-year is the distance that light travels in one year (~10 trillion kilometers or 63,000 AU) • The neighborhood stars generally move with the Sun in its orbit around the center of the Galaxy ...
... • The region of the Galaxy within about 20 lightyears of the Sun (40 lightyears diameter) • A light-year is the distance that light travels in one year (~10 trillion kilometers or 63,000 AU) • The neighborhood stars generally move with the Sun in its orbit around the center of the Galaxy ...
Size and Scale of the Universe
... • The region of the Galaxy within about 20 lightyears of the Sun (40 lightyears diameter) • A light-year is the distance that light travels in one year (~10 trillion kilometers or 63,000 AU) • The neighborhood stars generally move with the Sun in its orbit around the center of the Galaxy ...
... • The region of the Galaxy within about 20 lightyears of the Sun (40 lightyears diameter) • A light-year is the distance that light travels in one year (~10 trillion kilometers or 63,000 AU) • The neighborhood stars generally move with the Sun in its orbit around the center of the Galaxy ...
Lambda-CDM model
The ΛCDM (Lambda cold dark matter) or Lambda-CDM model is a parametrization of the Big Bang cosmological model in which the universe contains a cosmological constant, denoted by Lambda (Greek Λ), associated with dark energy, and cold dark matter (abbreviated CDM). It is frequently referred to as the standard model of Big Bang cosmology, because it is the simplest model that provides a reasonably good account of the following properties of the cosmos: the existence and structure of the cosmic microwave background the large-scale structure in the distribution of galaxies the abundances of hydrogen (including deuterium), helium, and lithium the accelerating expansion of the universe observed in the light from distant galaxies and supernovaeThe model assumes that general relativity is the correct theory of gravity on cosmological scales.It emerged in the late 1990s as a concordance cosmology, after a period of time when disparate observed properties of the universe appeared mutually inconsistent, and there was no consensus on the makeup of the energy density of the universe.The ΛCDM model can be extended by adding cosmological inflation, quintessence and other elements that are current areas of speculation and research in cosmology.Some alternative models challenge the assumptions of the ΛCDM model. Examples of these are modified Newtonian dynamics, modified gravity and theories of large-scale variations in the matter density of the universe.